/* Support for printing C++ values for GDB, the GNU debugger.
- Copyright 1986, 1988, 1989, 1991, 1994, 1995, 1996
+
+ Copyright (C) 1986, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
+ 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009
Free Software Foundation, Inc.
-This file is part of GDB.
+ This file is part of GDB.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "obstack.h"
+#include "gdb_obstack.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
#include "annotate.h"
#include "gdb_string.h"
#include "c-lang.h"
+#include "target.h"
+#include "cp-abi.h"
+#include "valprint.h"
+#include "cp-support.h"
+#include "language.h"
+
+/* Controls printing of vtbl's */
+static void
+show_vtblprint (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file, _("\
+Printing of C++ virtual function tables is %s.\n"),
+ value);
+}
+
+/* Controls looking up an object's derived type using what we find in
+ its vtables. */
+static void
+show_objectprint (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c,
+ const char *value)
+{
+ fprintf_filtered (file, _("\
+Printing of object's derived type based on vtable info is %s.\n"),
+ value);
+}
+
+static void
+show_static_field_print (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file, _("Printing of C++ static members is %s.\n"),
+ value);
+}
-int vtblprint; /* Controls printing of vtbl's */
-int objectprint; /* Controls looking up an object's derived type
- using what we find in its vtables. */
-static int static_field_print; /* Controls printing of static fields. */
static struct obstack dont_print_vb_obstack;
static struct obstack dont_print_statmem_obstack;
-static void
-cp_print_static_field PARAMS ((struct type *, value_ptr, GDB_FILE *, int, int,
- enum val_prettyprint));
+extern void _initialize_cp_valprint (void);
-static void
-cp_print_value PARAMS ((struct type *, char *, CORE_ADDR, GDB_FILE *,
- int, int, enum val_prettyprint, struct type **));
+static void cp_print_static_field (struct type *, struct value *,
+ struct ui_file *, int,
+ const struct value_print_options *);
-void
-cp_print_class_method (valaddr, type, stream)
- char *valaddr;
- struct type *type;
- GDB_FILE *stream;
-{
- struct type *domain;
- struct fn_field *f = NULL;
- int j = 0;
- int len2;
- int offset;
- char *kind = "";
- CORE_ADDR addr;
- struct symbol *sym;
- unsigned len;
- unsigned int i;
- struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
+static void cp_print_value (struct type *, struct type *, const gdb_byte *,
+ int, CORE_ADDR, struct ui_file *, int,
+ const struct value_print_options *, struct type **);
- domain = TYPE_DOMAIN_TYPE (target_type);
- if (domain == (struct type *)NULL)
- {
- fprintf_filtered (stream, "<unknown>");
- return;
- }
- addr = unpack_pointer (lookup_pointer_type (builtin_type_void), valaddr);
- if (METHOD_PTR_IS_VIRTUAL (addr))
- {
- offset = METHOD_PTR_TO_VOFFSET (addr);
- len = TYPE_NFN_FIELDS (domain);
- for (i = 0; i < len; i++)
- {
- f = TYPE_FN_FIELDLIST1 (domain, i);
- len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
-
- for (j = 0; j < len2; j++)
- {
- QUIT;
- if (TYPE_FN_FIELD_VOFFSET (f, j) == offset)
- {
- kind = "virtual ";
- goto common;
- }
- }
- }
- }
- else
- {
- sym = find_pc_function (addr);
- if (sym == 0)
- {
- error ("invalid pointer to member function");
- }
- len = TYPE_NFN_FIELDS (domain);
- for (i = 0; i < len; i++)
- {
- f = TYPE_FN_FIELDLIST1 (domain, i);
- len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
-
- for (j = 0; j < len2; j++)
- {
- QUIT;
- if (TYPE_FN_FIELD_STUB (f, j))
- check_stub_method (domain, i, j);
- if (STREQ (SYMBOL_NAME (sym), TYPE_FN_FIELD_PHYSNAME (f, j)))
- {
- goto common;
- }
- }
- }
- }
- common:
- if (i < len)
- {
- fprintf_filtered (stream, "&");
- c_type_print_varspec_prefix (TYPE_FN_FIELD_TYPE (f, j), stream, 0, 0);
- fprintf_unfiltered (stream, kind);
- if (TYPE_FN_FIELD_PHYSNAME (f, j)[0] == '_'
- && is_cplus_marker (TYPE_FN_FIELD_PHYSNAME (f, j)[1]))
- {
- cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j) + 1, "~",
- TYPE_FN_FIELDLIST_NAME (domain, i),
- 0, stream);
- }
- else
- {
- cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j), "",
- TYPE_FN_FIELDLIST_NAME (domain, i),
- 0, stream);
- }
- }
- else
- {
- fprintf_filtered (stream, "(");
- type_print (type, "", stream, -1);
- fprintf_filtered (stream, ") %d", (int) addr >> 3);
- }
-}
-/* This was what it was for gcc 2.4.5 and earlier. */
-static const char vtbl_ptr_name_old[] =
- { CPLUS_MARKER,'v','t','b','l','_','p','t','r','_','t','y','p','e', 0 };
-/* It was changed to this after 2.4.5. */
-const char vtbl_ptr_name[] =
- { '_','_','v','t','b','l','_','p','t','r','_','t','y','p','e', 0 };
+/* GCC versions after 2.4.5 use this. */
+const char vtbl_ptr_name[] = "__vtbl_ptr_type";
/* Return truth value for assertion that TYPE is of the type
"pointer to virtual function". */
int
-cp_is_vtbl_ptr_type(type)
- struct type *type;
+cp_is_vtbl_ptr_type (struct type *type)
{
char *typename = type_name_no_tag (type);
- return (typename != NULL
- && (STREQ (typename, vtbl_ptr_name)
- || STREQ (typename, vtbl_ptr_name_old)));
+ return (typename != NULL && !strcmp (typename, vtbl_ptr_name));
}
/* Return truth value for the assertion that TYPE is of the type
"pointer to virtual function table". */
int
-cp_is_vtbl_member(type)
- struct type *type;
+cp_is_vtbl_member (struct type *type)
{
+ /* With older versions of g++, the vtbl field pointed to an array
+ of structures. Nowadays it points directly to the structure. */
if (TYPE_CODE (type) == TYPE_CODE_PTR)
{
type = TYPE_TARGET_TYPE (type);
if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
{
type = TYPE_TARGET_TYPE (type);
- if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */
- || TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */
+ if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */
+ || TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */
{
/* Virtual functions tables are full of pointers
- to virtual functions. */
+ to virtual functions. */
return cp_is_vtbl_ptr_type (type);
}
}
+ else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) /* if not using thunks */
+ {
+ return cp_is_vtbl_ptr_type (type);
+ }
+ else if (TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */
+ {
+ /* The type name of the thunk pointer is NULL when using dwarf2.
+ We could test for a pointer to a function, but there is
+ no type info for the virtual table either, so it wont help. */
+ return cp_is_vtbl_ptr_type (type);
+ }
}
return 0;
}
/* Mutually recursive subroutines of cp_print_value and c_val_print to
print out a structure's fields: cp_print_value_fields and cp_print_value.
-
- TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
+
+ TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the
same meanings as in cp_print_value and c_val_print.
+ 2nd argument REAL_TYPE is used to carry over the type of the derived
+ class across the recursion to base classes.
+
DONT_PRINT is an array of baseclass types that we
should not print, or zero if called from top level. */
void
-cp_print_value_fields (type, valaddr, address, stream, format, recurse, pretty,
- dont_print_vb, dont_print_statmem)
- struct type *type;
- char *valaddr;
- CORE_ADDR address;
- GDB_FILE *stream;
- int format;
- int recurse;
- enum val_prettyprint pretty;
- struct type **dont_print_vb;
- int dont_print_statmem;
+cp_print_value_fields (struct type *type, struct type *real_type,
+ const gdb_byte *valaddr, int offset, CORE_ADDR address,
+ struct ui_file *stream, int recurse,
+ const struct value_print_options *options,
+ struct type **dont_print_vb, int dont_print_statmem)
{
int i, len, n_baseclasses;
- struct obstack tmp_obstack;
char *last_dont_print = obstack_next_free (&dont_print_statmem_obstack);
+ int fields_seen = 0;
CHECK_TYPEDEF (type);
len = TYPE_NFIELDS (type);
n_baseclasses = TYPE_N_BASECLASSES (type);
- /* Print out baseclasses such that we don't print
+ /* First, print out baseclasses such that we don't print
duplicates of virtual baseclasses. */
+
if (n_baseclasses > 0)
- cp_print_value (type, valaddr, address, stream,
- format, recurse+1, pretty, dont_print_vb);
+ cp_print_value (type, real_type, valaddr, offset, address, stream,
+ recurse + 1, options, dont_print_vb);
+
+ /* Second, print out data fields */
- if (!len && n_baseclasses == 1)
+ /* If there are no data fields, skip this part */
+ if (len == n_baseclasses || !len)
fprintf_filtered (stream, "<No data fields>");
else
{
- extern int inspect_it;
- int fields_seen = 0;
+ struct obstack tmp_obstack = dont_print_statmem_obstack;
if (dont_print_statmem == 0)
{
/* If we're at top level, carve out a completely fresh
chunk of the obstack and use that until this particular
invocation returns. */
- tmp_obstack = dont_print_statmem_obstack;
obstack_finish (&dont_print_statmem_obstack);
}
for (i = n_baseclasses; i < len; i++)
{
/* If requested, skip printing of static fields. */
- if (!static_field_print && TYPE_FIELD_STATIC (type, i))
+ if (!options->static_field_print
+ && field_is_static (&TYPE_FIELD (type, i)))
continue;
+
if (fields_seen)
fprintf_filtered (stream, ", ");
else if (n_baseclasses > 0)
{
- if (pretty)
+ if (options->pretty)
{
fprintf_filtered (stream, "\n");
print_spaces_filtered (2 + 2 * recurse, stream);
}
fields_seen = 1;
- if (pretty)
+ if (options->pretty)
{
fprintf_filtered (stream, "\n");
print_spaces_filtered (2 + 2 * recurse, stream);
}
- else
+ else
{
wrap_here (n_spaces (2 + 2 * recurse));
}
- if (inspect_it)
+ if (options->inspect_it)
{
if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
fputs_filtered ("\"( ptr \"", stream);
else
fputs_filtered ("\"( nodef \"", stream);
- if (TYPE_FIELD_STATIC (type, i))
+ if (field_is_static (&TYPE_FIELD (type, i)))
fputs_filtered ("static ", stream);
fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
- language_cplus,
+ current_language->la_language,
DMGL_PARAMS | DMGL_ANSI);
fputs_filtered ("\" \"", stream);
fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
- language_cplus,
+ current_language->la_language,
DMGL_PARAMS | DMGL_ANSI);
fputs_filtered ("\") \"", stream);
}
{
annotate_field_begin (TYPE_FIELD_TYPE (type, i));
- if (TYPE_FIELD_STATIC (type, i))
+ if (field_is_static (&TYPE_FIELD (type, i)))
fputs_filtered ("static ", stream);
fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
- language_cplus,
+ current_language->la_language,
DMGL_PARAMS | DMGL_ANSI);
annotate_field_name_end ();
- fputs_filtered (" = ", stream);
+ /* do not print leading '=' in case of anonymous unions */
+ if (strcmp (TYPE_FIELD_NAME (type, i), ""))
+ fputs_filtered (" = ", stream);
annotate_field_value ();
}
- if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i))
+ if (!field_is_static (&TYPE_FIELD (type, i))
+ && TYPE_FIELD_PACKED (type, i))
{
- value_ptr v;
+ struct value *v;
/* Bitfields require special handling, especially due to byte
- order problems. */
+ order problems. */
if (TYPE_FIELD_IGNORE (type, i))
{
- fputs_filtered ("<optimized out or zero length>", stream);
+ fputs_filtered ("<optimized out or zero length>", stream);
}
else
{
- v = value_from_longest (TYPE_FIELD_TYPE (type, i),
- unpack_field_as_long (type, valaddr, i));
-
- val_print (TYPE_FIELD_TYPE(type, i), VALUE_CONTENTS (v), 0,
- stream, format, 0, recurse + 1, pretty);
+ struct value_print_options opts = *options;
+ opts.deref_ref = 0;
+ v = value_from_longest
+ (TYPE_FIELD_TYPE (type, i),
+ unpack_field_as_long (type, valaddr + offset, i));
+
+ common_val_print (v, stream, recurse + 1, &opts,
+ current_language);
}
}
else
{
if (TYPE_FIELD_IGNORE (type, i))
{
- fputs_filtered ("<optimized out or zero length>", stream);
+ fputs_filtered ("<optimized out or zero length>", stream);
}
- else if (TYPE_FIELD_STATIC (type, i))
+ else if (field_is_static (&TYPE_FIELD (type, i)))
{
- value_ptr v;
- char *phys_name = TYPE_FIELD_STATIC_PHYSNAME (type, i);
- struct symbol *sym =
- lookup_symbol (phys_name, 0, VAR_NAMESPACE, 0, NULL);
- if (sym == NULL)
+ struct value *v = value_static_field (type, i);
+ if (v == NULL)
fputs_filtered ("<optimized out>", stream);
else
- {
- v = value_at (TYPE_FIELD_TYPE (type, i),
- (CORE_ADDR)SYMBOL_BLOCK_VALUE (sym));
- cp_print_static_field (TYPE_FIELD_TYPE (type, i), v,
- stream, format, recurse + 1,
- pretty);
- }
+ cp_print_static_field (TYPE_FIELD_TYPE (type, i), v,
+ stream, recurse + 1, options);
}
else
{
- val_print (TYPE_FIELD_TYPE (type, i),
- valaddr + TYPE_FIELD_BITPOS (type, i) / 8,
- address + TYPE_FIELD_BITPOS (type, i) / 8,
- stream, format, 0, recurse + 1, pretty);
+ struct value_print_options opts = *options;
+ opts.deref_ref = 0;
+ val_print (TYPE_FIELD_TYPE (type, i),
+ valaddr, offset + TYPE_FIELD_BITPOS (type, i) / 8,
+ address + TYPE_FIELD_BITPOS (type, i) / 8,
+ stream, recurse + 1, &opts,
+ current_language);
}
}
annotate_field_end ();
dont_print_statmem_obstack = tmp_obstack;
}
- if (pretty)
+ if (options->pretty)
{
fprintf_filtered (stream, "\n");
print_spaces_filtered (2 * recurse, stream);
}
- }
+ } /* if there are data fields */
+
fprintf_filtered (stream, "}");
}
baseclasses. */
static void
-cp_print_value (type, valaddr, address, stream, format, recurse, pretty,
- dont_print_vb)
- struct type *type;
- char *valaddr;
- CORE_ADDR address;
- GDB_FILE *stream;
- int format;
- int recurse;
- enum val_prettyprint pretty;
- struct type **dont_print_vb;
+cp_print_value (struct type *type, struct type *real_type,
+ const gdb_byte *valaddr, int offset, CORE_ADDR address,
+ struct ui_file *stream, int recurse,
+ const struct value_print_options *options,
+ struct type **dont_print_vb)
{
- struct obstack tmp_obstack;
struct type **last_dont_print
- = (struct type **)obstack_next_free (&dont_print_vb_obstack);
+ = (struct type **) obstack_next_free (&dont_print_vb_obstack);
+ struct obstack tmp_obstack = dont_print_vb_obstack;
int i, n_baseclasses = TYPE_N_BASECLASSES (type);
+ int thisoffset;
+ struct type *thistype;
if (dont_print_vb == 0)
{
/* If we're at top level, carve out a completely fresh
- chunk of the obstack and use that until this particular
- invocation returns. */
- tmp_obstack = dont_print_vb_obstack;
+ chunk of the obstack and use that until this particular
+ invocation returns. */
/* Bump up the high-water mark. Now alpha is omega. */
obstack_finish (&dont_print_vb_obstack);
}
for (i = 0; i < n_baseclasses; i++)
{
int boffset;
+ int skip;
struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
char *basename = TYPE_NAME (baseclass);
+ const gdb_byte *base_valaddr;
if (BASETYPE_VIA_VIRTUAL (type, i))
{
struct type **first_dont_print
- = (struct type **)obstack_base (&dont_print_vb_obstack);
+ = (struct type **) obstack_base (&dont_print_vb_obstack);
- int j = (struct type **)obstack_next_free (&dont_print_vb_obstack)
+ int j = (struct type **) obstack_next_free (&dont_print_vb_obstack)
- first_dont_print;
while (--j >= 0)
obstack_ptr_grow (&dont_print_vb_obstack, baseclass);
}
- boffset = baseclass_offset (type, i , valaddr, address);
+ thisoffset = offset;
+ thistype = real_type;
+
+ boffset = baseclass_offset (type, i, valaddr + offset, address);
+ skip = ((boffset == -1) || (boffset + offset) < 0) ? 1 : -1;
- if (pretty)
+ if (BASETYPE_VIA_VIRTUAL (type, i))
+ {
+ /* The virtual base class pointer might have been
+ clobbered by the user program. Make sure that it
+ still points to a valid memory location. */
+
+ if (boffset != -1
+ && ((boffset + offset) < 0
+ || (boffset + offset) >= TYPE_LENGTH (type)))
+ {
+ /* FIXME (alloca): unsafe if baseclass is really really large. */
+ gdb_byte *buf = alloca (TYPE_LENGTH (baseclass));
+ base_valaddr = buf;
+ if (target_read_memory (address + boffset, buf,
+ TYPE_LENGTH (baseclass)) != 0)
+ skip = 1;
+ address = address + boffset;
+ thisoffset = 0;
+ boffset = 0;
+ thistype = baseclass;
+ }
+ else
+ base_valaddr = valaddr;
+ }
+ else
+ base_valaddr = valaddr;
+
+ /* now do the printing */
+ if (options->pretty)
{
fprintf_filtered (stream, "\n");
print_spaces_filtered (2 * recurse, stream);
}
fputs_filtered ("<", stream);
/* Not sure what the best notation is in the case where there is no
- baseclass name. */
+ baseclass name. */
fputs_filtered (basename ? basename : "", stream);
fputs_filtered ("> = ", stream);
- if (boffset == -1)
+
+
+ if (skip >= 1)
fprintf_filtered (stream, "<invalid address>");
else
- cp_print_value_fields (baseclass, valaddr + boffset, address + boffset,
- stream, format, recurse, pretty,
- (struct type **) obstack_base (&dont_print_vb_obstack),
+ cp_print_value_fields (baseclass, thistype, base_valaddr,
+ thisoffset + boffset, address + boffset,
+ stream, recurse, options,
+ ((struct type **)
+ obstack_base (&dont_print_vb_obstack)),
0);
fputs_filtered (", ", stream);
if (dont_print_vb == 0)
{
/* Free the space used to deal with the printing
- of this type from top level. */
+ of this type from top level. */
obstack_free (&dont_print_vb_obstack, last_dont_print);
/* Reset watermark so that we can continue protecting
- ourselves from whatever we were protecting ourselves. */
+ ourselves from whatever we were protecting ourselves. */
dont_print_vb_obstack = tmp_obstack;
}
}
static member classes in an obstack and refuse to print them more
than once.
- VAL contains the value to print, TYPE, STREAM, RECURSE, and PRETTY
+ VAL contains the value to print, TYPE, STREAM, RECURSE, and OPTIONS
have the same meanings as in c_val_print. */
static void
-cp_print_static_field (type, val, stream, format, recurse, pretty)
- struct type *type;
- value_ptr val;
- GDB_FILE *stream;
- int format;
- int recurse;
- enum val_prettyprint pretty;
+cp_print_static_field (struct type *type,
+ struct value *val,
+ struct ui_file *stream,
+ int recurse,
+ const struct value_print_options *options)
{
+ struct value_print_options opts;
if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
{
CORE_ADDR *first_dont_print;
int i;
first_dont_print
- = (CORE_ADDR *)obstack_base (&dont_print_statmem_obstack);
- i = (CORE_ADDR *)obstack_next_free (&dont_print_statmem_obstack)
+ = (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack);
+ i = (CORE_ADDR *) obstack_next_free (&dont_print_statmem_obstack)
- first_dont_print;
while (--i >= 0)
{
if (VALUE_ADDRESS (val) == first_dont_print[i])
{
- fputs_filtered ("<same as static member of an already seen type>",
+ fputs_filtered ("<same as static member of an already"
+ " seen type>",
stream);
return;
}
sizeof (CORE_ADDR));
CHECK_TYPEDEF (type);
- cp_print_value_fields (type, VALUE_CONTENTS (val), VALUE_ADDRESS (val),
- stream, format, recurse, pretty, NULL, 1);
+ cp_print_value_fields (type, type, value_contents_all (val),
+ value_embedded_offset (val), VALUE_ADDRESS (val),
+ stream, recurse, options, NULL, 1);
return;
}
- val_print (type, VALUE_CONTENTS (val), VALUE_ADDRESS (val),
- stream, format, 0, recurse, pretty);
+
+ opts = *options;
+ opts.deref_ref = 0;
+ val_print (type, value_contents_all (val),
+ value_embedded_offset (val), VALUE_ADDRESS (val),
+ stream, recurse, &opts, current_language);
}
-void
-cp_print_class_member (valaddr, domain, stream, prefix)
- char *valaddr;
- struct type *domain;
- GDB_FILE *stream;
- char *prefix;
+
+/* Find the field in *DOMAIN, or its non-virtual base classes, with bit offset
+ OFFSET. Set *DOMAIN to the containing type and *FIELDNO to the containing
+ field number. If OFFSET is not exactly at the start of some field, set
+ *DOMAIN to NULL. */
+
+static void
+cp_find_class_member (struct type **domain_p, int *fieldno,
+ LONGEST offset)
{
-
- /* VAL is a byte offset into the structure type DOMAIN.
- Find the name of the field for that offset and
- print it. */
- int extra = 0;
- int bits = 0;
- register unsigned int i;
- unsigned len = TYPE_NFIELDS (domain);
- /* @@ Make VAL into bit offset */
- LONGEST val = unpack_long (builtin_type_int, valaddr) << 3;
+ struct type *domain;
+ unsigned int i;
+ unsigned len;
+
+ *domain_p = check_typedef (*domain_p);
+ domain = *domain_p;
+ len = TYPE_NFIELDS (domain);
+
for (i = TYPE_N_BASECLASSES (domain); i < len; i++)
{
- int bitpos = TYPE_FIELD_BITPOS (domain, i);
+ LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i);
+
QUIT;
- if (val == bitpos)
- break;
- if (val < bitpos && i != 0)
+ if (offset == bitpos)
{
- /* Somehow pointing into a field. */
- i -= 1;
- extra = (val - TYPE_FIELD_BITPOS (domain, i));
- if (extra & 0x7)
- bits = 1;
- else
- extra >>= 3;
- break;
+ *fieldno = i;
+ return;
}
}
- if (i < len)
+
+ for (i = 0; i < TYPE_N_BASECLASSES (domain); i++)
+ {
+ LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i);
+ LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (domain, i));
+
+ if (offset >= bitpos && offset < bitpos + bitsize)
+ {
+ *domain_p = TYPE_FIELD_TYPE (domain, i);
+ cp_find_class_member (domain_p, fieldno, offset - bitpos);
+ return;
+ }
+ }
+
+ *domain_p = NULL;
+}
+
+void
+cp_print_class_member (const gdb_byte *valaddr, struct type *type,
+ struct ui_file *stream, char *prefix)
+{
+ /* VAL is a byte offset into the structure type DOMAIN.
+ Find the name of the field for that offset and
+ print it. */
+ struct type *domain = TYPE_DOMAIN_TYPE (type);
+ LONGEST val = extract_signed_integer (valaddr, TYPE_LENGTH (type));
+ unsigned int fieldno;
+
+ /* Pointers to data members are usually byte offsets into an object.
+ Because a data member can have offset zero, and a NULL pointer to
+ member must be distinct from any valid non-NULL pointer to
+ member, either the value is biased or the NULL value has a
+ special representation; both are permitted by ISO C++. HP aCC
+ used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x
+ and other compilers which use the Itanium ABI use -1 as the NULL
+ value. GDB only supports that last form; to add support for
+ another form, make this into a cp-abi hook. */
+
+ if (val == -1)
+ {
+ fprintf_filtered (stream, "NULL");
+ return;
+ }
+
+ cp_find_class_member (&domain, &fieldno, val << 3);
+
+ if (domain != NULL)
{
char *name;
- fprintf_filtered (stream, prefix);
+ fputs_filtered (prefix, stream);
name = type_name_no_tag (domain);
if (name)
- fputs_filtered (name, stream);
+ fputs_filtered (name, stream);
else
c_type_print_base (domain, stream, 0, 0);
fprintf_filtered (stream, "::");
- fputs_filtered (TYPE_FIELD_NAME (domain, i), stream);
- if (extra)
- fprintf_filtered (stream, " + %d bytes", extra);
- if (bits)
- fprintf_filtered (stream, " (offset in bits)");
+ fputs_filtered (TYPE_FIELD_NAME (domain, fieldno), stream);
}
else
- fprintf_filtered (stream, "%d", val >> 3);
+ fprintf_filtered (stream, "%ld", (long) val);
}
+
void
-_initialize_cp_valprint ()
+_initialize_cp_valprint (void)
{
- add_show_from_set
- (add_set_cmd ("static-members", class_support, var_boolean,
- (char *)&static_field_print,
- "Set printing of C++ static members.",
- &setprintlist),
- &showprintlist);
- /* Turn on printing of static fields. */
- static_field_print = 1;
-
- add_show_from_set
- (add_set_cmd ("vtbl", class_support, var_boolean, (char *)&vtblprint,
- "Set printing of C++ virtual function tables.",
- &setprintlist),
- &showprintlist);
-
- add_show_from_set
- (add_set_cmd ("object", class_support, var_boolean, (char *)&objectprint,
- "Set printing of object's derived type based on vtable info.",
- &setprintlist),
- &showprintlist);
-
- /* Give people the defaults which they are used to. */
- objectprint = 0;
- vtblprint = 0;
+ add_setshow_boolean_cmd ("static-members", class_support,
+ &user_print_options.static_field_print, _("\
+Set printing of C++ static members."), _("\
+Show printing of C++ static members."), NULL,
+ NULL,
+ show_static_field_print,
+ &setprintlist, &showprintlist);
+
+ add_setshow_boolean_cmd ("vtbl", class_support,
+ &user_print_options.vtblprint, _("\
+Set printing of C++ virtual function tables."), _("\
+Show printing of C++ virtual function tables."), NULL,
+ NULL,
+ show_vtblprint,
+ &setprintlist, &showprintlist);
+
+ add_setshow_boolean_cmd ("object", class_support,
+ &user_print_options.objectprint, _("\
+Set printing of object's derived type based on vtable info."), _("\
+Show printing of object's derived type based on vtable info."), NULL,
+ NULL,
+ show_objectprint,
+ &setprintlist, &showprintlist);
+
obstack_begin (&dont_print_vb_obstack, 32 * sizeof (struct type *));
obstack_specify_allocation (&dont_print_statmem_obstack,
32 * sizeof (CORE_ADDR), sizeof (CORE_ADDR),
- xmalloc, free);
+ xmalloc, xfree);
}
projects / deliverable / binutils-gdb.git / blobdiff